The inner one (situated between 300 and 1000 km up, depending on a variety of factors) is comprised of protons, or positively charged particles, commonly referred to as Alpha radiation. This can be stopped with a thin piece of card.

The outer belt situated at 10,000 to 40,000 km depending on a variety of factors (magnetic intensity, Earth's position to the sun, and solar wind intensity) is comprised of electrons, the negatively charged particles. At a height of solar intensity when the wind is strong, the earth's magnetic field is strong and our position in our orbit, these electrons can reach 10 Megaelectron volts, enough to disable an unprotected satellite or kill an unprotected human. This belt is quite narrow, a few kilometres across.

During the moon shots, very little was known about the belts, with them only having been discovered 15 years prior to the Apollo missions.

By sheer damned luck, the moon shots took place at a low in the cycle, otherwise, with the limited aluminium shielding protecting the capsule, Buzz Aldrin would be dead by now. However, the length of time of exposure, even at full energies, would mean that it took years for the effects to show. Aldrin has said that even if it had been a one way trip, he would still have gone.

Strangely, not one of the skeptics of the moon shots is willing to stump up the several million dollars required to prove that the moon landings were faked: pointing the Hubble at the Sea of Tranquility and looking. The module will be plainly visible next to the laser reflector that scientists have since used to determine with great precision the distance to the moon. NASA won't point the Hubble there to prove the landings happened because they know it would make no difference (see Chandryaan below), and only people who cherry pick the evidence believe otherwise.

The problem I have with conspiracy theories such as the moon landing one, is the sheer number of people who were involved. There were thousands of people involved in the six moon landings and one failure, plus nine missions there and back. ALL of them would have to be quiet about it. On top of this NASA would somehow have to fabricate the 382kilos of moon rock. Compare this with the 40kilos of moon rock that have fallen because of meteorite impact with the moon throwing up debris, and it becomes the simplest explanation that the 382 kilos were brought back by Apollo 11 to 17.

Finally, the Chandrayaan 1 spacecraft has taken pictures of the landing sites. However the Conspiracy theorists would have you believe that the Indians are now in cahoots with NASA in order to get the pictures of the lunar lander onto the Chandrayaan 1's pictures. If NASA took them there, and let them breath the tenuous lunar atmosphere until the saliva boiled off their tongue, they still wouldn't change their view point.

So...there's stuff left on the moon from six landings, a laser reflector precisely placed so we can fire a laser at the moon and see how far away it is, tons of video, still and sound recordings of being there, images from other space agencies, thousands of people who were there doing it, and a third of a tonne of moon rock. On the other side, we have a couple of pictures that don't make sense to people without a high school diploma in basic physics, and the fact that it was dangerous and expensive. Although the NASA would agree with the last two, but it didn't stop them.

Occam's razor would suggest that the simplest explanation is that twelve men have walked on the moon. To the conspiracy theorists, I say: Get a life. You're wrong, move on.